Siege of Acre
1104 CE.
Shown on the map at 32.926°, 35.084°.
The siege of Acre took place in May 1104. It was of great importance for the consolidation of the Kingdom of Jerusalem, which had been created five years earlier. With the help of a Genoese fleet, King Baldwin I forced the surrender of the important port city after a siege that lasted 20 days. Although all defenders and residents wishing to leave the city had been assured by the king that they would be free to leave, taking their chattels with them, many of them had been massacred by the Genoese as they left the city. Moreover, the attackers sacked the city.
Text from the Wikipedia article Siege of Acre (1104), licensed CC BY-SA 4.0.